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#![feature(fn_traits, unboxed_closures)]
use std::ops::FnMut;
struct S {
x: isize,
y: isize,
}
impl FnMut<isize> for S {
//~^ ERROR type parameter to bare `FnMut` trait must be a tuple
extern "rust-call" fn call_mut(&mut self, z: isize) -> isize {
//~^ ERROR functions with the "rust-call" ABI must take a single non-self tuple argument
self.x + self.y + z
}
}
impl FnOnce<isize> for S {
//~^ ERROR type parameter to bare `FnOnce` trait must be a tuple
type Output = isize;
extern "rust-call" fn call_once(mut self, z: isize) -> isize {
//~^ ERROR functions with the "rust-call" ABI must take a single non-self tuple argument
self.call_mut(z) //~ ERROR `isize` is not a tuple
}
}
fn main() {
let mut s = S { x: 1, y: 2 };
drop(s(3)) //~ ERROR `isize` is not a tuple
//~^ ERROR cannot use call notation
}
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